CN103428443A - Video channel control system and video channel control method - Google Patents
Video channel control system and video channel control method Download PDFInfo
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- CN103428443A CN103428443A CN201210226151XA CN201210226151A CN103428443A CN 103428443 A CN103428443 A CN 103428443A CN 201210226151X A CN201210226151X A CN 201210226151XA CN 201210226151 A CN201210226151 A CN 201210226151A CN 103428443 A CN103428443 A CN 103428443A
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Abstract
A video channel control system and a video channel control method system comprise a control module, a first video transmission device and a second video transmission device. The first video transmission device comprises a plurality of video transmission interfaces and a processing module. The control module provides a communication control signal containing control information. The plurality of video transmission interfaces transmit digital or analog video signals, which include a plurality of first video data transmission channels. The processing module generates a control command according to the communication control signal. The first video transmission device outputs a control command through one of the plurality of first video data transmission channels according to the control information. The second video transmission device transmits a digital or analog video signal. The second video transmission device comprises at least one second video data transmission channel and receives the control command from the first video transmission device through the second video data transmission channel.
Description
Technical field
The present invention is relevant with transmission of video, particularly about a kind of video channel control system and video channel control method.
Background technology
Therefore in recent years, because the multimedia video technical development obtains quite rapidly, various video frequency transmitter and video play devices with difference in functionality constantly appear on the market.Viewing and admiring the convenience on video and using elasticity in order to promote the consumer, the transmission of video mechanism of how improving between each video frequency transmitter just seems quite important.
Please refer to Figure 1A and Figure 1B, Figure 1A and Figure 1B illustrate the schematic diagram of the different video transmission mechanism between the conventional video transmitting device.As shown in Figure 1A and Figure 1B, no matter be will switch same display unit DIS1 to show the vision signal from different input unit IN1 and IN2, or will branch to from the vision signal of same input unit IN1 different display unit DIS1 and DIS2, because control module 5 all needs to couple all video frequency transmitter VT1 ~ VT3 at different levels simultaneously, therefore, every grade of connecting line CB1 ~ CB3 that video frequency transmitter VT1 ~ VT3 is respectively arranged with control port F1 ~ F3 and couples with control module 5.The progression that need transmit long distance or video frequency transmitter once video is more, all can cause become very complex and cost of whole transmission of video mechanism also can significantly improve, and is unfavorable for its market competitiveness.
Summary of the invention
Therefore, the present invention proposes a kind of video channel control system and video channel control method, to solve the problems referred to above that prior art was suffered from.
A category of the present invention is to propose a kind of video channel control system.In a specific embodiment, the video channel control system includes control module, the first video frequency transmitter and the second video frequency transmitter.The first video frequency transmitter comprises a plurality of transmission of video interfaces and processing module.Control module is in order to provide the Communication Control that comprises control information signal.The first video frequency transmitter couples and receives the Communication Control signal mutually with control module.Described a plurality of transmission of video interface is in order to transmission digital video signal or analog video signal, and it comprises a plurality of the first video data transmitting passages.Processing module couples described a plurality of the first video data transmitting passage, in order to according to the Communication Control signal, to produce control command.According to control information, by described a plurality of the first video data transmitting passages, one of them exports control command to the first video frequency transmitter.The second video frequency transmitter couples the first video frequency transmitter, in order to transmission digital video signal or analog video signal.The second video frequency transmitter comprises at least one the second video data transmitting passage, and receives control command by the second video data transmitting passage from the first video frequency transmitter.
In practical application, described a plurality of transmission of video interface can be Video Graphics Array (Video GraphicsArray, VGA) coffret, digital visual interface (Digital Video Interface, DVI) or high-definition multimedia interface (High Definition Multimedia Interface, HDMI); The described a plurality of first or second video data transmitting passage can be DDC (Display Data Channel, DDC), RGB (RGB) passage, minimize differential transfer signal (Transition-Minimized Differential Signaling, TMDS) passage, consumer electronics are controlled (Consumer Electronics Control, CEC) passage or horizontal vertical (HV) passage.The first video frequency transmitter can be matrix type video switcher (Matrix Video Switch), video switcher (Switch) or video distributor (Splitter), and the second video frequency transmitter can be video comfort device (Booster), matrix type video switcher, video switcher or video distributor.
The first video frequency transmitter can couple the second video frequency transmitter by first and second video data transmitting passage, with the communication friendship of carrying out between the second video frequency transmitter and the first video frequency transmitter, holds and the transfer control order; When the second video frequency transmitter receives control command, transmission, port switching (Port), power supply control, replacement (Reset), the state that the second video frequency transmitter carries out digital video signal or analog video signal according to control command reads, version is identified or the control of each push button function.Control command can be inter-integrated circuit (Inter-Integrated Circuit, I
2C) communication bus signal, general non-synchronous transmissions device (Universal Asynchronous Receiver/Transmitter, UART) signal or USB (Universal Serial Bus, USB) signal.Control module controls signal to the first video frequency transmitter by general non-synchronous transmissions device (Universal Asynchronous Receiver/Transmitter, UART) coffret, RS232 coffret or USB coffret outputting communication.
The video channel control system can further comprise the 3rd video frequency transmitter.The 3rd video frequency transmitter couples the second video frequency transmitter, in order to transmission digital video signal or analog video signal.The 3rd video frequency transmitter comprises at least one the 3rd video data transmitting passage, and receives control command by the 3rd video data transmitting passage from the second video frequency transmitter.When the second video frequency transmitter receives control command, the second video frequency transmitter is according to control command output digital video signal or analog video signal to the three video frequency transmitters.The second video frequency transmitter couples the 3rd video frequency transmitter by second and third video data transmitting passage, with the communication friendship of carrying out between the 3rd video frequency transmitter and the second video frequency transmitter, holds and the transfer control order.
Another category of the present invention is to propose a kind of video channel control method.In a specific embodiment, this video channel control method at least is applied at least one second video data transmitting passage of a plurality of first video data transmitting passages of the first video frequency transmitter and the second video frequency transmitter.This video channel control method comprises the following step: a Communication Control signal (a) is provided, and wherein the Communication Control signal comprises a control information; (b) produce a control command according to the Communication Control signal; (c) according to control information, by described a plurality of the first video data transmitting passages, one of them exports control command; (d) receive control command by the second video data transmitting passage from the first video data transmitting passage.
Compared to prior art, video channel control system proposed by the invention and video channel control method are utilized original extending display identification code (Extended Display Identification Data that is used for obtaining display unit, EDID) DDC (Display Data Channel, DDC) etc. set up communication and hand over (handshaking) mechanism of holding, to realize the communication between video transmission equipments at different levels, therefore can reach the purpose that the video transmission equipment tandem is controlled.Due to can be directly by transfer control orders such as DDCs between video transmission equipment, therefore only need the former the video interface be provided with (video port) and transmission of video cable (video cable) can complete the transmission of tandem order, tandem control port and connecting line need not additionally be set, can effectively save cost.
Can be by following detailed Description Of The Invention and appended graphic being further understood about the advantages and spirit of the present invention.
The accompanying drawing explanation
Figure 1A and Figure 1B illustrate the schematic diagram of the different video transmission mechanism between the conventional video transmitting device.
Fig. 2 illustrates the functional block diagram according to an embodiment of the video channel control system of the first preferred embodiment of the present invention.
Fig. 3 illustrates the detailed maps of the video channel control system in Fig. 2.
Fig. 4 A, Fig. 4 B and Fig. 4 C illustrate respectively the first video frequency transmitter, the second video frequency transmitter and the 3rd video frequency transmitter and analog video signal are carried out to the sequential chart of the function of video switcher (Switch).
Fig. 4 D, Fig. 4 E and Fig. 4 F illustrate the first video frequency transmitter, the second video frequency transmitter and the 3rd video frequency transmitter and digital video signal are carried out to the sequential chart of the function of video distributor (Splitter).
Fig. 5 illustrates the functional block diagram of another embodiment of video channel control system.
Fig. 6 illustrates the detailed maps of the video channel control system in Fig. 5.
Fig. 7 illustrates the schematic diagram of another embodiment of video channel control system.
Fig. 8 illustrates the flow chart according to the video channel control method of the second preferred embodiment of the present invention.
[main element symbol description]
S10 ~ S26: process step 1,2: video channel control system
VT1,11,21: the first video frequency transmitters
VT2,12,22: the second video frequency transmitters
VT3,13: the three video frequency transmitters
IN1 ~ IN2,14,24A ~ 24D: video input device
DIS1 ~ DIS2,15,25: video output device
5,10,20: control module 110,210,220: processing module
CS: Communication Control signal VS, VS1 ~ VS4: vision signal
CMD: control command CB1 ~ CB3: connecting line
113,115 ~ 117,123 ~ 127,133 ~ 137,221 ~ 222, N1～N4, K1 ~ K4: transmission of video interface
T0 ~ t9, t2' ~ t3': time F1 ~ F3: control port
N1'～N4', K1' ~ K4', 221': video data transmitting passage
114: the control command coffret
113', 115' ~ 117': the first video data transmitting passage
123' ~ 127': the second video data transmitting passage
133' ~ 137': the 3rd video data transmitting passage
Embodiment
The present invention sets up communication by the former DDC etc. of extending display identification code that is used for obtaining display unit be provided with and hands over the mechanism of holding, to realize the communication between video transmission equipments at different levels, therefore can reach the purpose that the video transmission equipment tandem is controlled, and tandem control port and connecting line need not additionally be set, also can effectively save cost.
The first preferred embodiment according to the present invention is a kind of video channel control system.In this embodiment, the video channel control system includes at least one video input device, many video frequency transmitters and at least one video output device.Described a plurality of video frequency transmitter is serially connected with between video input device and video output device.Each video frequency transmitter includes respectively video data transmitting passage separately.
Please refer to Fig. 2, Fig. 2 illustrates the functional block diagram of an embodiment of this video channel control system.As shown in Figure 2, video channel control system 1 includes control module 10, the first video frequency transmitter 11, the second video frequency transmitter 12, the 3rd video frequency transmitter 13, video input device 14 and video output device 15.Wherein, the first video frequency transmitter 11, the second video frequency transmitter 12 and the 3rd video frequency transmitter 13 are serially connected with between video input device 14 and video output device 15; Control module 10 is coupled to the first video frequency transmitter 11.In fact, video input device can be PC, DVD player, game machine or other any equipment with function that video is provided, and there is no specific restriction; Video output device can be that LCD screen, digital television, conventional television or other have the equipment of Video Output, also without specific restriction.As for control module 10, except separating independent the setting with each video frequency transmitter, also can be set together with arbitrary video frequency transmitter, also without specific restriction.Control module 10 is such as being the equipment that Touch Screen or notebook computer etc. are available for users to input control signal.In this embodiment, the first video frequency transmitter 11 includes processing module 110 and a plurality of the first video data transmitting passage 113', 115' ~ 117'; The second video frequency transmitter 12 includes a plurality of second video data transmitting passage 123' ~ 127'; The 3rd video frequency transmitter 13 includes a plurality of the 3rd video data transmitting passage 133' ~ 137'.
As shown in Figure 2, the first video frequency transmitter 11, the second video frequency transmitter 12 and the 3rd video frequency transmitter 13 that are serially connected with between video input device 14 and video output device 15 transfer to video output device 15 in order to the vision signal VS that video input device 14 is provided, and for video output device 15, play or display video signal VS.For example, suppose that video input device 14 is that DVD player and video output device 15 are digital television, the vision signal VS that video input device (DVD player) 14 DVD playing back films provide sequentially transfers to video output device (digital television) 15 via the first video frequency transmitter 11, the second video frequency transmitter 12 and the 3rd video frequency transmitter 13, then is viewed and admired to the user by video output device (digital television) 15 display video signal VS.In fact, vision signal VS can be digital video signal or analog video signal, there is no specific restriction.
Also please refer to Fig. 3, Fig. 3 illustrates the detailed maps of the video channel control system 1 in Fig. 2.As shown in Figure 3, the first video frequency transmitter 11 includes processing module 110, a plurality of the first transmission of video interface 113,115 ~ 117 and control command coffret 114; The first transmission of video interface 113,115 ~ 117 comprises respectively the first video data transmitting passage 113', 115' ~ 117'.The second video frequency transmitter 12 includes a plurality of second transmission of video interface the 123 ~ 127, second transmission of video interfaces 123 ~ 127 and comprises respectively second video data transmitting passage 123' ~ 127'; The 3rd video frequency transmitter 13 includes a plurality of the 3rd transmission of video interface the 133 ~ 137, three transmission of video interfaces 133 ~ 137 and comprises respectively the 3rd video data transmitting passage 133' ~ 137'.In practical application, a plurality of transmission of video interface described above can be Video Graphics Array (Video Graphics Array, VGA) coffret, digital visual interface (Digital Video Interface, DVI), high-definition multimedia interface (High Definition Multimedia Interface, HDMI) or other there is the coffret of transmission of video function, in order to transmission digital video signal or analog video signal.
As shown in Figure 3, the vision signal VS that video input device 14 provides inputs to the first video frequency transmitter 11 by the first transmission of video interface 113, and the Communication Control signal CS that comprises control information that control module 10 provides inputs to the first video frequency transmitter 11 by control command coffret 114.In fact, control module 10 can be by general non-synchronous transmissions device (Universal Asynchronous Receiver/Transmitter, UART) coffret, RS232 coffret, USB coffret or other signal transmission interface outputting communication control signals CS to the first video frequency transmitter 11.
The control information that Communication Control signal CS comprises can be the destination information of transmission video signal VS, or the user wishes the function that the first video frequency transmitter 11, the second video frequency transmitter 12 or the 3rd video frequency transmitter 13 are carried out, such as opening connectivity port, close connectivity port, read switching connectivity port, power supply control, replacement, state, version is identified or the function such as button control, but not as limit.
In this embodiment, suppose that the control information of Communication Control signal CS includes the destination information of transmission video signal VS, and the destination of transmission video signal VS is video output device 15.When the processing module 110 of the first video frequency transmitter 11 receives the Communication Control signal CS from control module 10, processing module 110 will produce control command CMD according to Communication Control signal CS, and by described a plurality of the first video data transmitting passage 113', 115' ~ 117', one of them exports control command CMD according to the control information in Communication Control signal CS, be for example by the first video data transmitting passage 115' output control command CMD.In fact, control command CMD can be inter-integrated circuit (Inter-Integrated Circuit, I
2C) communication bus signal, general non-synchronous transmissions device (Universal Asynchronous Receiver/Transmitter, UART) signal or USB (Universal Serial Bus, USB) signal, but not as limit.From the above: the control information in Communication Control signal CS also can comprise about optionally by described a plurality of the first video data transmitting passage 113', 115' ~ 117 ' in the information of some the first video data transmitting passage output control command CMD.Similarly, control information also can comprise the first video frequency transmitter 11 and can optionally export the vision signal VS from video input device 14 by some the first transmission of video interfaces in described a plurality of the first transmission of video interfaces 115 ~ 117.
It should be noted that, in the present embodiment, the first video frequency transmitter 11 couples the second video frequency transmitter 12 by the first video data transmitting passage 115' and the second video data transmitting passage 124', with the communication friendship of carrying out between the second video frequency transmitter 12 and the first video frequency transmitter 11, holds and transfer control order CMD.Therefore, the control command CMD that the first video frequency transmitter 11 is exported by the first video data transmitting passage 115' can be transferred to by the first transmission of video interface 115 the second transmission of video interface 124 of the second video frequency transmitter 12, and is received by the second video data transmitting passage 124'.In fact, the first video data transmitting passage 113', 115' ~ 117' or second video data transmitting passage 123' ~ 127' can be DDC (Display Data Channel, DDC), RGB (RGB) passage, minimize differential transfer signal (Transition-Minimized Differential Signaling, TMDS) passage, consumer electronics are controlled (Consumer Electronics Control, CEC) passage, horizontal vertical (HV) passage or other similar transmission channels, there is no specific restriction.
It should be noted that, if the destination of transmission video signal VS is the video output device (not shown) that is coupled to the second video frequency transmitter 12, when the second video frequency transmitter 12 receives control command CMD, the second video frequency transmitter 12 will export vision signal VS to this video output device according to control command CMD.Yet, because the destination of transmission video signal VS in this embodiment is the video output device 15 that is coupled to the 3rd video frequency transmitter 13, but not be coupled to the second video frequency transmitter 12, so the second video frequency transmitter 12 also needs to export vision signal VS and control command CMD to the 3rd video frequency transmitter 13 again.Now, in the present embodiment, the second video frequency transmitter 12 couples the 3rd video frequency transmitter 13 by the second video data transmitting passage 127' and the 3rd video data transmitting passage 133', with the communication friendship of carrying out between the 3rd video frequency transmitter 13 and the second video frequency transmitter 12, holds and transfer control order CMD to the three video frequency transmitters 13.
Therefore, the control command CMD that the second video frequency transmitter 12 is exported by the second video data transmitting passage 127' can be transferred to by the second transmission of video interface 127 the 3rd transmission of video interface 133 of the 3rd video frequency transmitter 13, by the 3rd video data transmitting passage 133', is received.In fact, the 3rd video data transmitting passage 133' ~ 137' can be DDC (Display Data Channel, DDC), RGB (RGB) passage, minimize differential transfer signal (Transition-Minimized Differential Signaling, TMDS) passage, consumer electronics are controlled (Consumer Electronics Control, CEC) passage, horizontal vertical (HV) passage or other similar transmission channels, there is no specific restriction.Finally, the 3rd video frequency transmitter 13 exports vision signal VS to video output device 15 by the 3rd transmission of video interface 135 according to control command CMD by the 3rd transmission of video interface 133 again.
Next, please refer to Fig. 4 A, Fig. 4 B and Fig. 4 C, Fig. 4 A, Fig. 4 B and Fig. 4 C illustrate respectively the first video frequency transmitter 11, the second video frequency transmitter 12 and the 3rd video frequency transmitter 13 and carry out the sequential chart of difference in functionality under different times.It should be noted that, Fig. 4 A, Fig. 4 B and Fig. 4 C illustrate the function that the first video frequency transmitter 11, the second video frequency transmitter 12 and 13 pairs of analog video signals of the 3rd video frequency transmitter are carried out video switcher (Switch).As shown in Fig. 4 A, Fig. 4 B and Fig. 4 C, in time t0, the first video frequency transmitter 11, the second video frequency transmitter 12 and the 3rd video frequency transmitter 13 start extension of displaying identified data (the Extended display identification data of its video output device coupled of read/write respectively, EDID), until time t1 just finishes the program of read/write.
Then, program is held in the friendship that the first video frequency transmitter 11, the second video frequency transmitter 12 and the 3rd video frequency transmitter 13 all carry out VGA output since time t1.During time t2 to t3, the first video frequency transmitter 11 will receive the Communication Control signal CS from control module 10.In time t3, the first video frequency transmitter 11 starts to carry out the friendship of VGA input and holds program, until till time t4.
During time t3 to t4, because program is held in the friendship that the first video frequency transmitter 11 carries out the VGA input, and the second video frequency transmitter 12 still continues to carry out the friendship of VGA output and holds program, make between the first video frequency transmitter 11 and the second video frequency transmitter 12 and can carry out communication and hand over and hold.Therefore, during time t3 to t4 in, the second video frequency transmitter 12 can receive the vision signal VS from the first transmission of video interface of the first video frequency transmitter 11 by the second transmission of video interface.
Then, during time t4 to t5 in, the first video frequency transmitter 11 will receive the back-signalling from the second video frequency transmitter 12, represents that the second video frequency transmitter 12 has received the first video frequency transmitter 11 and transmitted vision signal VS in the past.After receiving back-signalling, the first video frequency transmitter 11 will be during time t5 to t6 in transfer control order CMD to the second video frequency transmitter 12, that is the second video frequency transmitter 12 receives control command CMD in during time t5 to t6.
During the second video frequency transmitter 12 is respectively at time t3 to t4 and time t5 to t6 during in receive the vision signal VS and control command CMD from the first video frequency transmitter 11 after, the first video frequency transmitter 11 completes the function that it should be carried out.During time t6 to t7, program is held in the friendship that the second video frequency transmitter 12 will carry out the VGA input according to control command CMD.During time t6 to t7, the 3rd video frequency transmitter 13 still continue to be carried out the friendship of VGA output and is held program, makes between the second video frequency transmitter 12 and the 3rd video frequency transmitter 13 can carry out the communication friendship and hold.Therefore, during time t6 to t7 in, the 3rd video frequency transmitter 13 can receive the vision signal VS from the second video data transmitting passage of the second video frequency transmitter 12 by the 3rd video data transmitting passage.
Then, during time t7 to t8 in, the second video frequency transmitter 12 will receive the back-signalling from the 3rd video frequency transmitter 13, represents that the 3rd video frequency transmitter 13 has received the second video frequency transmitter 12 and transmitted vision signal VS in the past.After receiving back-signalling, the second video frequency transmitter 12 will be during time t8 to t9 in transfer control order CMD to the three video frequency transmitters 13, that is the 3rd video frequency transmitter 13 receives control command CMD in during time t8 to t9.During the 3rd video frequency transmitter 13 is respectively at time t6 to t7 and time t8 to t9 during in receive the vision signal VS and control command CMD from the second video frequency transmitter 12 after, the second video frequency transmitter 12 completes the function that it should be carried out.In time t9, the 3rd video frequency transmitter 13 will start to perform an action according to control command CMD, for example vision signal VS is sent to video output device, for video output device play, open connectivity port, close connectivity port, read switching connectivity port, power supply control, replacement, state, version is identified or the function such as button control, but not as limit.。
It should be noted that, as shown in Figure 4 C, program is held in the friendship that the 3rd video frequency transmitter 13 is carried out VGA output since time t1, but until till time t2 ', the second video frequency transmitter 12 also continues the friendship of execution VGA output and holds program, therefore still can't carry out the communication friendship between the 3rd video frequency transmitter 13 and the second video frequency transmitter 12, holds.Therefore, in time t2 ' to t3 ' during in, the 3rd video frequency transmitter 13 is the read/write extension of displaying identified data of its video output device coupled once again.
Then, please refer to Fig. 4 D, Fig. 4 E and Fig. 4 F, Fig. 4 D, Fig. 4 E and Fig. 4 F illustrate the sequential chart that the first video frequency transmitter 11, the second video frequency transmitter 12 and 13 pairs of digital video signals of the 3rd video frequency transmitter are carried out the function of video distributor (Splitter).It should be noted that, this example is with the difference that above-mentioned Fig. 4 A to Fig. 4 C carries out the function of video switcher to analog signal: the digital video signal in this example sequentially is sent to the first video frequency transmitter 11 by the 3rd video frequency transmitter 13, the second video frequency transmitter 12, and its transmission direction is contrary with above-mentioned example.In addition, the first video frequency transmitter 11 during time t1 to t2 in and time t3 to t4 during in carry out respectively HDMI input and HDMI output friendship hold program; The second video frequency transmitter 12 during time t1 to t5 in and time t6 to t7 during in carry out respectively HDMI input and HDMI output friendship hold program; The 3rd video frequency transmitter 13 during time t1 to t2 ' in and time t3 ' hold program to the friendship of carrying out the HDMI input in during t8.
Please refer to Fig. 5, Fig. 5 illustrates the functional block diagram of another embodiment of this video channel control system.As shown in Figure 5, video channel control system 1 also includes control module 10, the first video frequency transmitter 11, the second video frequency transmitter 12, the 3rd video frequency transmitter 13, video input device 14 and video output device 15 equally.It should be noted that, the difference of Fig. 5 and Fig. 2 is: the vision signal VS that the video input device 14 in Fig. 5 provides sequentially transfers to video output device 15 by the 3rd video frequency transmitter 13, the second video frequency transmitter 12 and the first video frequency transmitter 11, and the vision signal VS provided with video input device 14 in Fig. 2 sequentially transfers to the reversed in order of video output device 15 by the first video frequency transmitter 11, the second video frequency transmitter 12 and the 3rd video frequency transmitter 13.
But what Fig. 5 was identical with Fig. 2 is, the Communication Control signal CS that control module 10 provides is sent to the first video frequency transmitter 11, the processing module 110 of the first video frequency transmitter 11 produces control command CMD according to Communication Control signal CS, and pass through the first transmission of video interface 113 according to the control information in Communication Control signal CS, 115 ~ 117 the first video data transmitting passage output control command CMD that comprise, then sequentially by the communication between the first video frequency transmitter 11 and the second video frequency transmitter 12, hand over the mechanism of holding to export control command CMD to the second video frequency transmitter 12 again, then by the communication between the second video frequency transmitter 12 and the 3rd video frequency transmitter 13, hand over the mechanism of holding to export control command CMD to the 3rd video frequency transmitter 13 again.Illustrate the detailed maps of the video channel control system 1 in Fig. 5 as for Fig. 6.
Then, please refer to Fig. 7, Fig. 7 illustrates the schematic diagram of another embodiment of this video channel control system.As shown in Figure 7, video channel control system 2 includes control module 20, the first video frequency transmitter 21, the second video frequency transmitter 22, video input device 24A ~ 24D and video output device 25.Wherein, the first video frequency transmitter 21 includes processing module 210, a plurality of transmission of video interface N1～N4, K1 ~ K4 and RS232 coffret, and transmission of video interface N1～N4, K1 ~ K4 comprise respectively video data transmitting passage N1' ~ N4', K1' ~ K4'; The second video frequency transmitter 22 includes processing module 220, transmission of video interface 221 and 222, and transmission of video interface 221 comprises video data transmitting passage 221'.
In practical application, the first video frequency transmitter 21 can be matrix type video switcher (Matrix Video Switch), video switcher (Switch) or video distributor (Splitter), and the second video frequency transmitter 22 can be video comfort device (Booster), matrix type video switcher, video switcher or video distributor, but not as limit.
In this embodiment, video input device 24A ~ 24D provides respectively the first vision signal VS1 ~ the 4th vision signal VS4, and the first video frequency transmitter 21 receives respectively the first vision signal VS1 ~ the 4th vision signal VS4 by transmission of video interface N1～N4.Provide Communication Control signal CS as for 20 of control modules, and by the RS232 coffret of the first video frequency transmitter 21, Communication Control signal CS is sent to processing module 210.Communication Control signal CS includes control information.Then, processing module 210 produces control command CMD according to Communication Control signal CS again, and optionally export control command CMD to video data transmitting passage K4' according to control information, also can optionally VS4 be transferred out from transmission of video interface K4 according to control information or control command CMD.
Because the first video frequency transmitter 21 in this embodiment is the matrix type video switcher, suppose according to control information or control command CMD, want the 4th vision signal VS4 that the first video frequency transmitter 21 switching outputs are inputted by video input device 24D, and select transmission of video interface K4 to be exported to the second video frequency transmitter 22, after the video data transmitting passage 221' that now will comprise by the transmission of video interface 221 of video data transmitting passage K4' output control command CMD to the second video frequency transmitter 22, be sent to processing module 220.Afterwards, processing module 220 exports the 4th vision signal VS4 to video output device 25 according to control command CMD by transmission of video interface 222, for video output device 25, shows the 4th vision signal VS4.
In this embodiment, the distance of supposing video input device 24A ~ 24D to the first video frequency transmitter 21 (matrix type video switcher) is different, that is the length that is coupled to the connecting line between video input device 24A ~ 24D and the first video frequency transmitter 21 (matrix type video switcher) is different, is respectively 40 meters, 30 meters, 20 meters and 10 meters.Because the second video frequency transmitter 22 is video comfort device (Booster), after can carrying out corresponding compensation in order to the 4th vision signal VS4 to inputing to the second video frequency transmitter 22, then export video output device 25 to.
The second preferred embodiment according to the present invention is a kind of video channel control method.In this embodiment, this video channel control method can be applicable to a video channel control system, but not as limit.This video channel control system includes at least one video input device, many video frequency transmitters and at least one video output device.Described a plurality of video frequency transmitter is serially connected with between video input device and video output device.Each video frequency transmitter includes respectively video data transmitting passage separately.
In fact, video input device can be PC, DVD player, game machine or other any equipment with video input function, there is no specific restriction; Video output device can be that LCD screen, digital television, conventional television or other have the equipment of Video Output, also without specific restriction.
In this embodiment, suppose that the video channel control system includes three video frequency transmitters that are serially connected with between video input device and video output device, be respectively the first video frequency transmitter, the second video frequency transmitter and the 3rd video frequency transmitter, and the first video frequency transmitter, the second video frequency transmitter and the 3rd video frequency transmitter include respectively a plurality of the first video data transmitting passages, at least one second video data transmitting passage and at least one the 3rd video data transmitting passage.
It should be noted that, the number that video input device, video output device and video frequency transmitter arrange is determined by actual demand, with this example, is not limited.For example, can be the settings of many video input devices to a video output device, or video input device is to the setting of many video output devices, or many video input devices all can to arranging of many video output devices.
Please refer to Fig. 8, Fig. 8 illustrates the flow chart of the video channel control method of this embodiment.As shown in Figure 8, at first, in step S10, video input device provides a vision signal.In fact, this vision signal can be digital video signal or analog video signal, there is no specific restriction.Then, the method execution step S12, provide Communication Control signal to the first video frequency transmitter that comprises control information.In step S14, the first video frequency transmitter produces a control command according to the Communication Control signal.In step S16, according to control information, by described a plurality of the first video data transmitting passages, one of them exports control command to the first video frequency transmitter.In step S18, the method couples the first video frequency transmitter and the second video frequency transmitter by first and second video data transmitting passage, with the communication friendship of carrying out between the second video frequency transmitter and the first video frequency transmitter, holds and the transfer control order.In step S20, the second video frequency transmitter receives control command and vision signal by the second video data transmitting passage from the first video data transmitting passage.In step S22, the method couples the second video frequency transmitter and the 3rd video frequency transmitter by second and third video data transmitting passage, with the communication friendship of carrying out between the 3rd video frequency transmitter and the second video frequency transmitter, holds and the transfer control order.In step S24, the 3rd video frequency transmitter receives control command and vision signal by the 3rd video data transmitting passage from the second video data transmitting passage.In step S26, the 3rd video frequency transmitter outputting video signal is to video output device, for the video output device display video signal.
Compared to prior art, video channel control system proposed by the invention and the utilization of video channel control method for example original DDC that is used for obtaining the extending display identification code of display unit are set up communication and are handed over the mechanism of holding, to realize the communication between video transmission equipments at different levels, therefore can reach the purpose that the video transmission equipment tandem is controlled.Owing between video transmission equipment, can directly passing through the order of DDC transfer control, therefore only need the former the video interface be provided with and transmission of video cable can complete the transmission of tandem order, tandem control port and connecting line need not additionally be set, can effectively save cost.
By the above detailed description of preferred embodiments, hope can be known description feature of the present invention and spirit more, and not with above-mentioned disclosed preferred embodiment, category of the present invention is limited.On the contrary, its objective is that hope can contain in the category of the scope of the claims of being arranged in of various changes and tool equality institute of the present invention wish application.
Claims (16)
1. a video channel control system at least comprises:
One control module, in order to a Communication Control signal to be provided, wherein this Communication Control signal comprises a control information;
One first video frequency transmitter, couple and receive this Communication Control signal mutually with this control module, this first video frequency transmitter comprises:
A plurality of transmission of video interfaces, in order to transmission digital video signal or analog video signal, it comprises a plurality of the first video data transmitting passages; And
One processing module, couple described a plurality of the first video data transmitting passage, in order to according to this Communication Control signal, to produce a control command, wherein, according to this control information, by described a plurality of the first video data transmitting passages, one of them exports this control command to this first video frequency transmitter; And
One second video frequency transmitter, couple this first video frequency transmitter, in order to transmission digital video signal or analog video signal, this second video frequency transmitter comprises at least one the second video data transmitting passage, and receives this control command by this second video data transmitting passage from this first video frequency transmitter.
2. video channel control system as claimed in claim 1, is characterized in that, described a plurality of transmission of video interfaces are Video Graphics Array coffret, digital visual interface or high-definition multimedia interface.
3. video channel control system as claimed in claim 1, it is characterized in that, the described a plurality of first or second video data transmitting passage is DDC, RGB passage, minimize differential transfer signalling channel, consumer electronics control channel or horizontal vertical passage.
4. video channel control system as claimed in claim 1, it is characterized in that, this first video frequency transmitter couples this second video frequency transmitter by this first video data transmitting passage and this second video data transmitting passage, to carry out communication between this second video frequency transmitter and this first video frequency transmitter, hands over and holds and transmit this control command.
5. video channel control system as claimed in claim 1, it is characterized in that, when this second video frequency transmitter receives this control command, transmission, port switching, power supply control, replacement, the state that this second video frequency transmitter carries out digital video signal or analog video signal according to this control command reads, version is identified or button control.
6. video channel control system as claimed in claim 1, is characterized in that, further comprises:
One the 3rd video frequency transmitter, couple this second video frequency transmitter, in order to transmission digital video signal or analog video signal, the 3rd video frequency transmitter comprises at least one the 3rd video data transmitting passage, and receives this control command by the 3rd video data transmitting passage from this second video frequency transmitter.
7. video channel control system as claimed in claim 6, it is characterized in that, when this second video frequency transmitter receives this control command, this second video frequency transmitter according to this control command output digital video signal or analog video signal to the 3rd video frequency transmitter.
8. video channel control system as claimed in claim 6, it is characterized in that, this second video frequency transmitter couples the 3rd video frequency transmitter by this second video data transmitting passage and the 3rd video data transmitting passage, to carry out communication between the 3rd video frequency transmitter and this second video frequency transmitter, hands over and holds and transmit this control command.
9. video channel control system as claimed in claim 1, is characterized in that, this control command is inter-integrated circuit communication bus signal, general non-synchronous transmissions device signal or universal serial bus signal.
10. video channel control system as claimed in claim 1, is characterized in that, this control module is exported this Communication Control signal to this first video frequency transmitter by general non-synchronous transmissions device coffret, RS232 coffret or USB coffret.
11. video channel control system as claimed in claim 1, it is characterized in that, this first video frequency transmitter is matrix type video switcher, video switcher or video distributor, and this second video frequency transmitter is video comfort device, matrix type video switcher, video switcher or video distributor.
A 12. video channel control method, at least be applied at least one second video data transmitting passage of a plurality of first video data transmitting passages of one first video frequency transmitter and one second video frequency transmitter, this video channel control method comprises the following step:
(a) provide a Communication Control signal, wherein this Communication Control signal comprises a control information;
(b) produce a control command according to this Communication Control signal;
(c) according to this control information, by described a plurality of the first video data transmitting passages, one of them exports this control command; And
(d) receive this control command by this second video data transmitting passage from this first video data transmitting passage.
13. video channel control method as claimed in claim 12, is characterized in that, further comprises the following step:
Couple this first video frequency transmitter and this second video frequency transmitter by this first video data transmitting passage and this second video data transmitting passage, hold with the communication friendship of carrying out between this second video frequency transmitter and this first video frequency transmitter.
14. video channel control method as claimed in claim 12, is characterized in that, in step (d) afterwards, this video channel control method further comprises the following step:
Process a vision signal and export a video output device to according to this control command.
15. video channel control method as claimed in claim 12, it is characterized in that, also be applied at least one the 3rd video data transmitting passage of one the 3rd video frequency transmitter, in step (d) afterwards, this video channel control method further comprises the following step:
Receive this control command by the 3rd video data transmitting passage from this second video data transmitting passage.
16. video channel control method as claimed in claim 15, is characterized in that, further comprises the following step:
Couple the 3rd video frequency transmitter and this second video frequency transmitter by this second video data transmitting passage and the 3rd video data transmitting passage, hold with the communication friendship of carrying out between the 3rd video frequency transmitter and this second video frequency transmitter.
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| TW101118818 | 2012-05-25 | ||
| TW101118818A TWI556649B (en) | 2012-05-25 | 2012-05-25 | Video channel control system and video channel control method |
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Also Published As
| Publication number | Publication date |
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| TWI556649B (en) | 2016-11-01 |
| TW201349865A (en) | 2013-12-01 |
| CN103428443B (en) | 2016-07-27 |
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